WO2021248867A1

WO2021248867A1 - Signal transmission method for rotary guided well drilling tool, and system

Info

Publication number: WO2021248867A1
Application number: PCT/CN2020/137931
Authority: WO
Inventors: 谢棋军; 杨永友; 底青云; 刘庆波; 洪林峰
Original assignee: 中国科学院地质与地球物理研究所
Priority date: 2020-06-09
Filing date: 2020-12-21
Publication date: 2021-12-16
Also published as: JP2022536427A; CN111894562A; JP7127207B2; CN111894562B

Abstract

A signal transmission method for a rotary guided well drilling tool, and a system, the rotary guided well drilling tool comprising a rotary core shaft, and the method comprising: obtaining a primary signal of a primary signal transmission loop (100) collected by a first collector (160), the primary signal transmission loop (100) comprising a primary coil assembly (180) arranged on the rotary core shaft, and the primary coil assembly (180) comprising a first primary coil (181) and a second primary coil (182); determining whether the primary signal transmission loop (100) is abnormal according to the primary signal; in the situation that the the primary signal transmission loop (100) is abnormal, sending a corresponding start-up signal to a first fault determination module (170) arranged within the primary signal transmission loop (100), so as to allow the first fault determination module (170) to perform start-up and determine an operating state of the primary coil assembly (180); determining a signal transmission operating mode according to the operating state of the primary coil assembly (180). By means of the present technical solution, the reliability of signal transmission for a rotary guided well drilling tool can be effectively improved.

Description

Signal transmission method and system of rotary steering drilling tool

Technical field

This application relates to the field of petroleum drilling technology, and in particular to a signal transmission method and system for a rotary steering drilling tool.

Background technique

Rotary steering drilling tool is a cutting-edge automated drilling technology that can accurately guide, reduce development costs, and maximize the development of oil and gas resources.

In the prior art, a rotary steering drilling tool generally includes a non-rotating sleeve and a rotating mandrel. The non-rotating sleeve and the rotating mandrel are connected by upper and lower bearings to form a relatively rotatable structure. Non-rotating sleeves are usually equipped with attitude measurement circuits (used to test the inclination angle, azimuth angle and tool face angle of the instrument in the downhole) and multiple independent hydraulic control circuits (each outputting different plunger fluid pressures to generate The combined forces of different sizes and different directions are used to control the tilting of the instrument) and other circuits. The rotating mandrel is provided with a central control circuit, which is used to control the posture measurement circuit and hydraulic control circuit on the non-rotating sleeve). In other words, signal transmission is required between the central control circuit provided on the rotating mandrel and the posture measurement circuit and hydraulic control circuit provided on the non-rotating sleeve. In the prior art, a signal transmission coil is provided on the rotating main shaft and the non-rotating sleeve respectively, so that the circuits on the rotating main shaft and the non-rotating sleeve realize bidirectional communication.

Since rotary steering drilling tools are generally used in oil drilling downholes, the environment of oil drilling is harsh, and the signal transmission coils set on the rotating mandrel and non-rotating sleeve are prone to aging and failure, resulting in communication errors and affecting rotary steering drilling. Normal use of tools.

Based on this, how to improve the reliability of signal transmission in rotary steering drilling tools has become an urgent technical problem to be solved.

Summary of the invention

The embodiments of this specification provide a signal transmission method and system for a rotary steering drilling tool, which are used to solve the following technical problems in the prior art: due to the harsh use environment of the rotary steering drilling tool, a rotating mandrel and a non-rotating sleeve are caused The signal transmission coil set above is prone to aging and failure, leading to communication errors and affecting the normal use of the rotary steering drilling tool.

The embodiments of this specification adopt the following technical solutions:

A signal transmission method for a rotary steering drilling tool, the rotary steering drilling tool including a rotating mandrel, the method including:

Acquiring a primary signal of a primary signal transmission circuit collected by the first collector, the primary signal transmission circuit including a primary coil assembly disposed on the rotating mandrel, the primary coil assembly including a first primary coil and a second primary coil;

According to the primary signal, determine whether the primary signal transmission loop is abnormal;

In the case that the primary signal transmission circuit is abnormal, a corresponding activation signal is sent to the first failure determination module provided in the primary signal transmission circuit to enable the first failure determination module to activate and determine the primary coil The working status of the component;

According to the working state of the primary coil assembly, the working mode of signal transmission is determined.

In some embodiments of the present application, the rotary steering drilling tool further includes a non-rotating sleeve, characterized in that the method further includes:

Acquire the secondary signal of the secondary signal transmission circuit collected by the second collector, the secondary signal transmission circuit includes a secondary coil assembly disposed on the non-rotating sleeve, and the secondary coil assembly includes a first secondary Coil and second secondary coil;

According to the secondary signal, determine whether the secondary signal transmission loop is abnormal;

In the case that the secondary signal transmission circuit is abnormal, a corresponding activation signal is sent to the second failure determination module provided in the secondary signal transmission circuit, so that the second failure determination module activates and determines the The working status of the secondary coil assembly.

In some embodiments of the present application, the working state includes: a normal state and an abnormal state;

The normal state of the primary coil assembly is that both the first primary coil and the second primary coil work normally;

The abnormal state of the primary coil assembly is that the first primary coil is working normally, the second primary coil is malfunctioning, or the first primary coil is malfunctioning and the second primary coil is malfunctioning;

The normal state of the secondary coil assembly is that both the first secondary coil and the second secondary coil are working normally;

The abnormal state of the secondary coil assembly is the normal operation of the first secondary coil and the failure of the second secondary coil, or the failure of the first secondary coil and the normal operation of the second secondary coil.

In some embodiments of the present application, the determining the working mode of the signal transmission according to the working state of the primary coil assembly specifically includes:

When the primary coil assembly is in a normal state and the secondary coil assembly is in an abnormal state, the signal transmission working mode is the first signal transmission mode.

In some embodiments of the present application, the first signal working transmission mode is:

The first controller in the primary signal transmission loop divides the corresponding digital signals to obtain the first digital sub-signal and the second digital sub-signal;

The first digital sub-signal is modulated into a carrier sub-signal of the first frequency through the first modem filter module, and is transmitted to the first primary coil connected to the first modem filter module; and through the second The modem filter module modulates the second digital sub-signal into a carrier sub-signal of the second frequency, and transmits it to a second primary coil connected to the second modem filter module; wherein, the first frequency Different from the frequency value of the second frequency;

The normally working secondary coil in the secondary coil assembly receives the carrier sub-signal of the first frequency and the carrier sub-signal of the second frequency;

Demodulate to obtain the corresponding first digital sub-signal and second digital sub-signal through the modulation and demodulation filtering module connected to the secondary coil in the normal state in the secondary coil assembly;

The second controller in the secondary signal transmission loop obtains a corresponding digital signal according to the first digital sub-signal and the second digital sub-signal.

In some embodiments of the present application, the determining the working mode of the signal transmission according to the working state of the primary coil component and the working state of the secondary coil component specifically further includes:

When the primary coil assembly is in an abnormal state and the secondary coil assembly is in a normal state, the signal transmission mode is the second signal transmission working mode.

In some embodiments of the present application, the second signal transmission working mode is:

The first controller in the primary signal transmission loop modulates the corresponding digital signal through a modulation and demodulation filter module connected to a normal working primary coil to obtain a carrier signal of a corresponding frequency;

The secondary coil in the secondary coil assembly receives the carrier signal, and the second controller in the secondary signal transmission loop demodulates the carrier signal through the corresponding modulation and demodulation filter module to obtain The corresponding digital signal.

In some embodiments of the present application, when the primary signal transmission loop and the secondary signal transmission loop are both normal, it is determined that the signal transmission working mode is the third signal transmission working mode;

Wherein, the third signal transmission working mode is:

The first controller in the primary signal transmission loop divides the corresponding digital signals to obtain the third digital sub-signal and the fourth digital sub-signal;

The third digital sub-signal is modulated into a carrier sub-signal of a third frequency through the first modem filter module, and is transmitted to the first primary coil connected to the first modem filter module; and The second modulation and demodulation filtering module modulates the fourth digital sub-signal into a carrier sub-signal of the fourth frequency and transmits it to the second primary coil connected to the second modulation and demodulation filtering module; wherein, the first The frequency value of the third frequency is different from the frequency value of the fourth frequency;

Both the first secondary coil and the second secondary coil can sense the carrier sub-signal of the third frequency and the carrier sub-signal of the fourth frequency;

Through the third modulation and demodulation filter module connected to the first secondary coil, demodulate the carrier sub-signal of the third frequency to obtain the corresponding third digital sub-signal; The fourth modulation and demodulation filtering module connected to the first-stage coil demodulates the carrier sub-signal of the fourth frequency to obtain the corresponding fourth digital sub-signal;

The second controller in the secondary signal transmission loop generates a corresponding digital signal according to the third digital sub-signal and the fourth digital sub-signal.

In some embodiments of the present application, the first fault determination module determining the working state of the primary coil assembly specifically includes:

The first fault determination module sends corresponding excitation signals to the input terminal of the first primary coil and the input terminal of the second primary coil respectively;

After sending the corresponding excitation signal, the first fault determination module collects the signals of the output terminal of the first primary coil and the output terminal of the second primary coil respectively, and obtains the determination data according to the collected signals;

According to the determination data, the working state of the primary coil assembly is determined.

A signal transmission system for a rotary steering drilling tool. The rotary steering drilling tool includes a rotating mandrel. The system includes:

The first collector is used to collect the primary signal of the primary signal transmission circuit, the primary signal transmission circuit includes a primary coil assembly arranged on the rotating mandrel, the primary coil assembly includes a first primary coil and a second primary coil ；

The first processor is electrically connected to the first collector, and is used to obtain the primary signal and determine whether the primary signal transmission circuit is abnormal according to the primary signal; and when the primary signal transmission circuit is abnormal In this case, send a corresponding start signal to the first fault determination module;

The first fault determination module is arranged in the primary signal transmission circuit, and is used for starting according to the starting signal and determining the working state of the primary coil assembly.

The above-mentioned at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects: by providing the primary coil assembly, the signal transmission reliability of the rotary steering drilling tool is effectively improved, maintenance costs are reduced, and service life is increased. In addition, the signal transmission working mode can be determined according to the working state of the primary coil assembly to provide different working modes. While ensuring the normal operation of the signal transmission, the signal transmission rate is increased as much as possible and energy consumption is saved.

Description of the drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the attached picture:

Figure 1 is a schematic structural diagram of a signal transmission system for a rotary steering drilling tool provided by an embodiment of the specification;

2 is a flowchart of a signal transmission method of a rotary steering drilling tool provided by an embodiment of this specification;

Fig. 3 is another structural schematic diagram of a signal transmission system of a rotary steering drilling tool provided by an embodiment of the specification;

Fig. 4 is another flow chart of a signal transmission method of a rotary steering drilling tool provided by an embodiment of the specification.

detailed description

In order to make the purpose, technical solutions and advantages of this specification clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the specification, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The embodiment of this specification provides a structural schematic diagram of a signal transmission system of a rotary steering drilling tool. As shown in FIG. 1, the system includes: a primary signal transmission circuit 100 and a secondary signal transmission circuit 200.

Among them, the primary signal transmission loop 100 may include: a first controller 110, a first modem filter module 121, a second modem filter module 122, a first switch module 130, a first resonance compensation module 141, and a second resonance filter module. The compensation module 142, the first processor 150, the first collector 160, the first fault determination module 170, and the primary coil assembly 180 (including the first primary coil 181 and the second primary coil 182).

As shown in FIG. 1, the first controller 110 is respectively connected to one end of the first modem filtering module 121, one end of the second modem filtering module 122, and the first processor 150. The other end of the first modem filter module 121 is connected to one end of the first resonance compensation module 141 through the first switch module 130, and the other end of the first resonance compensation module 141 is connected to the input end of the first primary coil 181. The output terminal of the primary coil 181 is connected to the first controller 110. The other end of the second modem filter module 122 is connected to one end of the second resonance compensation module 142 through the first switch module 130, the other end of the second resonance compensation module 142 is connected to the input end of the second primary coil 182, and the second The output terminal of the primary coil 182 is connected to the first controller 110. One end of the first collector 160 is connected to the input end of the first primary coil 181, and the other end is connected to the input end of the second primary coil 182. One end of the first fault determination module 170 is respectively connected to the input terminal of the first primary coil 181 and the input terminal of the second primary coil 182, and the other end of the first fault determination module 170 is respectively connected to the output terminal of the first primary coil 181 and the second primary coil 182. The output terminal of the primary coil 182. In addition, the first collector 160 and the first fault determination module 170 are both connected to the first processor 150.

The above-mentioned secondary signal transmission loop 200 may include: a third secondary coil 210, a fifth resonance compensation module 220, a third switch module 230, a fifth modem filtering module 240, and a third controller 250. Among them, one end of the third controller 250 is sequentially connected to the input ends of the fifth modem filter module 240, the third switch module 230, the fifth resonance compensation module 220, and the third secondary coil 210. The output end is connected to the other end of the third controller 250 to form a secondary signal transmission loop 200, as shown in FIG. 1.

Based on the signal transmission system of a rotary steering drilling tool shown in FIG. 1, an embodiment of the present application also provides a signal transmission method of a rotary steering drilling tool. As shown in FIG. 2, the method includes the following steps:

S201: The first collector 160 collects the primary signal of the primary signal transmission circuit 100 and sends it to the first processor 150.

The first collector 160 separately collects the signal on the first branch where the first primary coil 181 is located, and the signal on the second branch where the second primary coil 182 is located. That is to say, when the first branch and the second branch are normal, the collected primary signals include the signal on the first branch and the signal on the second branch.

It should be noted that the above-mentioned first branch may be composed of a first modem filtering module 121, a first switch module 130, a first resonance compensation module 141, and a first primary coil 181. The second branch may be composed of a second modem filter module 122, a first switch module 130, a second resonance compensation module 142, and a second primary coil 182.

Preferably, the first collector 160 collects the signals of the first primary coil 181 and the second primary coil 182.

S202: The first processor 150 determines whether the primary signal transmission circuit 100 is abnormal according to the above-mentioned primary signal.

Specifically, the first processor 150 may determine whether the primary signal transmission circuit 100 is abnormal according to the signal contained in the primary signal. That is to say, when the first collector 160 collects the signals on the first branch and the second branch, it means that the primary signal transmission circuit 100 is normal; when only one branch (such as the first branch, the second branch) is collected If the signal on the branch or the signals on the first branch and the second branch are not collected, it indicates that the primary signal transmission circuit 100 is abnormal.

It is clear that the abnormality of the primary signal transmission circuit 100 may be caused by the disconnection of the first branch and/or the second branch.

S203: When the primary signal transmission circuit 100 is abnormal, the first processor 150 sends a start signal to the first failure determination module 170 provided in the primary signal transmission circuit 100.

S204: After receiving the start signal, the first fault determination module 170 sends corresponding excitation signals to the input terminal of the first primary coil 181 and the input terminal of the second primary coil 182 respectively.

S205: The first fault determination module 170 collects signals from the output terminal of the first primary coil 181 and the output terminal of the second primary coil 182 respectively.

S206: The first fault determination module 170 determines the working state of the primary working coil assembly 180 according to the signals collected from the output terminal of the first primary coil 181 and the output terminal of the second primary coil 182, respectively.

In some embodiments of the present application, the working state of the primary working coil assembly 180 may include a normal state, an abnormal state, and a fault state.

The normal state of the primary coil assembly 180 is that both the first primary coil 181 and the second primary coil 182 work normally.

It should be noted that when the primary signal transmission circuit 100 is normal, it can be explained that the primary coil assembly 180 is in a normal state.

The abnormal state of the primary coil assembly 180 is that the first primary coil 181 is working normally and the second primary coil 182 is malfunctioning, or the first primary coil 181 is malfunctioning and the second primary coil 182 is malfunctioning. To put it simply, the abnormal state of the primary coil assembly 180 refers to a failure of one of the first primary coil 181 and the second primary coil 182.

The failure state of the primary coil assembly 180 is that both the first primary coil 181 and the second primary coil 182 are malfunctioning.

Specifically, when the first fault determination module 170 can collect the signal at the output terminal of the first primary coil 181, it indicates that the first primary coil 181 is working normally. Otherwise, the first primary coil 181 fails. The same is true for the second primary coil 182, which will not be repeated here.

S207: The first processor 150 determines a working mode of signal transmission according to the working state of the primary coil assembly 180 from the first fault judging module 170.

In the above manner, by arranging the first primary coil 181 and the second primary coil 182, the reliability of the coil can be effectively improved, and it is avoided that when a problem occurs in one of the primary coils, the connection between the rotating mandrel and the non-rotating sleeve cannot be carried out. Signal transmission.

In some embodiments of the present application, the first processor 150 determines the working mode of signal transmission according to the working state of the primary coil assembly 180 from the first fault determination module 170, which may specifically include:

When the primary coil assembly 180 is in an abnormal state, that is, one of the primary coils in the primary coil assembly 180 is faulty. In this case, the transmission is carried out according to the normal signal transmission mode, that is, the normal primary coil in the primary coil assembly 180 is normal Work.

In some embodiments of the present application, when the primary signal transmission circuit 100 is normal, its signal transmission working mode can be implemented as follows:

The first processor 150 sends a corresponding instruction to the first controller 110;

The first controller 110 divides the corresponding digital signal according to the instruction from the first processor 150 to obtain the corresponding fifth digital sub-signal and sixth digital sub-signal;

The fifth digital sub-signal is modulated by the first modem filter module 121 to obtain the carrier sub-signal of the fifth frequency F5; the sixth digital sub-signal is modulated by the second modem filter module 122 to obtain the sixth frequency F6 Carrier sub-signal; where the fifth frequency F5 and the sixth frequency F6 are different;

The carrier sub-signal of the fifth frequency F5 is capacitively compensated by the first resonance compensation module 141 and transmitted to the first primary coil 181; the carrier sub-signal of the sixth frequency F6 is capacitively compensated by the second resonance compensation module 142 and is transmitted to Second primary coil 182;

Through electromagnetic induction, the secondary coil in the secondary signal transmission loop 200 receives the carrier sub-signal of the fifth frequency F5 and the carrier sub-signal of the sixth frequency F6;

The fifth modulation and demodulation filter module 240 in the secondary signal transmission loop 200 activates parallel dual channels, demodulates the carrier sub-signal of the fifth frequency and the carrier sub-signal of the sixth frequency, and finally obtains the corresponding digital signal.

It can be seen from the above scheme that in the case of a failure of the primary coil, the normal use of signal transmission is not affected. Moreover, when the primary coil assembly 180 is in a normal state, that is, when the first primary coil 181 and the second primary coil 182 are working normally, the corresponding digital signal can be divided and passed through the corresponding primary coil assembly 180. Transmission also greatly improves the speed of signal transmission.

It should be noted that the modem filter module mentioned in the embodiment of this application may be composed of a modulation unit, a filter unit, and a demodulation unit, for example, the first modem filter module 121 and the second modem filter module 122 Wait. Among them, the modulation unit can modulate the digital signal into a carrier signal of a corresponding frequency, and the frequency of the carrier signal modulated by the modulation unit can be adjusted and set according to actual needs. The demodulation unit is used to demodulate the carrier signal of the corresponding frequency to obtain the corresponding digital signal. The frequency of the demodulation can be adjusted and set according to actual needs. The filtering unit is used for filtering and optimizing the carrier signal. Moreover, the modulation unit, the filtering unit, and the demodulation unit may all have single-channel communication, dual-channel communication, multi-channel communication, and so on.

In some embodiments of the present application, in order to further improve the reliability of the above-mentioned signal transmission system, a secondary signal transmission circuit 300 can be constructed according to the same principle as the primary signal transmission circuit 100, as shown in FIG. Another structural schematic diagram of a signal transmission system of a rotary steering drilling tool provided by the embodiment of the specification). As shown in FIG. 3, the system includes a primary signal transmission circuit 100 and a secondary signal transmission circuit 300. Wherein, the primary signal transmission circuit 100 is the same as the primary signal transmission circuit shown in FIG. 1, and will not be repeated in the embodiment of the present application.

As shown in FIG. 3, the secondary signal transmission loop 300 includes: a second controller 310, a third modem filter module 321, a fourth modem filter module 322, a second switch module 330, and a third resonance compensation module 341 , The fourth resonance compensation module 342, the second processor 350, the second collector 360, the second fault determination module 370, the secondary coil assembly 380 (including the first secondary coil 381 and the second secondary coil 382).

The connection mode in the secondary signal transmission circuit 300 is the same as or similar to the connection mode of the primary signal transmission circuit 100 shown in FIG.

In the system shown in FIG. 3, in addition to the primary signal transmission circuit 100 including the primary coil assembly 180, the secondary signal transmission circuit 300 also includes the secondary coil assembly 380, which can further improve the safety and accuracy of signal transmission. , To further improve the user experience.

Based on the signal transmission system provided by the embodiment of the application shown in FIG. 3, the signal transmission method of the rotary steering drilling tool provided by the embodiment of the application further includes the following steps (as shown in FIG. 4):

S401: The second collector 360 collects the secondary signal of the secondary signal transmission circuit 300.

The method for the second collector 360 to collect the secondary signal of the secondary transmission circuit 300 is similar to the principle that the first collector 160 collects the primary signal of the primary signal transmission circuit 100.

Specifically, the second collector 360 separately collects the signal on the third branch where the first secondary coil 381 is located, and the signal on the fourth branch where the second secondary coil 382 is located. That is to say, when the third branch and the fourth branch are normal, the above-mentioned secondary signal includes the signal on the third branch and the signal on the fourth branch.

It should be noted that the above-mentioned third branch may be composed of a third modem filter module 321, a second switch module 330, a third resonance compensation module 341, and a first secondary coil 381. The fourth branch may be composed of a fourth modem filter module 322, a second switch module 330, a fourth resonance compensation module 342, and a second secondary coil 382.

Preferably, the second collector 360 collects signals from the input terminal of the first secondary coil 381 and the input terminal of the second secondary coil 382.

S402: The second processor 350 obtains the foregoing secondary signal, and determines whether the secondary signal transmission loop 300 is abnormal according to the secondary signal.

The working principle of step S402 is similar to that of step S202 described above, and will not be described in detail in the embodiment of the present application.

S403: In the event that the secondary signal transmission circuit 300 is abnormal, send a corresponding activation signal to the second failure determination module 370 provided in the secondary signal transmission circuit 300, so that the second failure determination module 370 activates and determines the secondary The working state of the coil assembly 380.

It should be noted that the working principles of step S403 and steps S203-S206 are similar or the same, and therefore, will not be repeated in this embodiment of the application.

In other words, the working state of the secondary coil assembly 380 is similar to the working state of the primary coil assembly 180, and may also include a normal state, an abnormal state, and a fault state.

Similarly, the normal state of the secondary coil assembly 380 is that both the first secondary coil and the second secondary coil 382 work normally. The abnormal state of the secondary coil assembly 380 is that the first secondary coil 381 is working normally and the second secondary coil 382 is malfunctioning, or the first secondary coil 381 is malfunctioning and the second secondary coil 382 is malfunctioning. To put it simply, the abnormal state of the secondary coil assembly 380 refers to a failure of one of the first secondary coil 381 and the second secondary coil 382. The fault state of the secondary coil assembly 380 is that both the first secondary coil 381 and the second secondary coil 382 are faulty.

In some embodiments of the present application, steps S201-S206 are performed first, and then steps S401-S403 are performed; it is also possible to perform steps S401-S403 first, and then steps S201-S206; or, steps S201-S206 and S401 -S403 is executed at the same time, and the specific execution sequence is not limited in the embodiment of this application.

Furthermore, as understood by those skilled in the art, the first processor 150 and the second processor 350 may be the same processor or different processors. In the case that the first processor 150 and the second processor 350 are not the same processor, in the embodiment of the present application, a general processor may be designed to manage the first processor 150 and the second processor 350 , And determine the working mode of signal transmission.

In the case that the secondary signal transmission circuit 300 includes the first secondary coil 381 and the second secondary coil 382, in the above step S207, the signal transmission is determined according to the working state of the primary coil assembly 180 from the first failure determination module 170 The working mode can include:

According to the working state of the primary coil assembly 180 from the first fault determining module 170 and the working state of the secondary coil assembly 380 from the second fault determining module 370, the working mode of signal transmission is determined.

Specifically, the signal transmission working mode may include a first signal transmission working mode, a second signal transmission working mode, and a fourth signal transmission working mode.

When the primary coil assembly 180 is in a normal state and the secondary coil assembly 380 is in an abnormal state, the signal transmission working mode is the first signal transmission mode.

When the primary coil assembly 180 is in an abnormal state and the secondary coil assembly 380 is in a normal state, the signal transmission mode is the second signal transmission working mode.

When the primary coil assembly 180 and the secondary coil assembly 380 are both abnormal, the signal transmission mode is the fourth signal transmission working mode

Among them, the first signal transmission working mode is:

The first controller 110 in the primary signal transmission circuit 100 divides the corresponding digital signals to obtain the first digital sub-signal and the second digital sub-signal;

The first digital sub-signal is modulated into a carrier sub-signal of the first frequency F1 through the first modem filter module 121, and transmitted to the first primary coil 181 connected to the first modem filter module 121; and through the second The modem filter module 122 modulates the second digital sub-signal into a carrier sub-signal of the second frequency F2, and transmits it to the second primary coil 182 connected to the second modem filter module 122; wherein, the first frequency F1 is The frequency value of the second frequency F2 is different;

Through electromagnetic induction, the normal secondary coil in the secondary coil assembly 380 receives the carrier sub-signal of the first frequency F1 and the carrier sub-signal of the second frequency F2;

The corresponding first digital sub-signal and second digital sub-signal are obtained through demodulation through the modulation and demodulation filter module connected to the secondary coil in the normal state in the secondary coil assembly 380;

The second controller 310 in the secondary signal transmission loop 300 obtains the corresponding digital signal according to the first digital sub-signal and the second digital sub-signal.

It should be noted that the above F1 and F5 may be the same or different; the above F2 and F6 may be the same or different.

In the embodiment of the present application, the frequency of the modulated carrier signal is determined according to the corresponding parameters of the corresponding modem filter module. When the modulation parameter of the modem filter module changes, the frequency of the modulated carrier signal It's also different.

To put it simply, when the primary coil assembly 180 is in a normal state and the secondary coil assembly 380 is in an abnormal state, its working mode is the same as that in the signal transmission system shown in FIG. 1 where the primary coil assembly 180 is in a normal state. It will not be repeated in the embodiments of this application.

In addition, the second signal transmission working mode is as follows:

The first controller 110 in the primary signal transmission circuit 100 modulates the corresponding digital signal through the modulation and demodulation filter module connected to the normal working primary coil to obtain a carrier signal of the corresponding frequency;

The secondary coil in the secondary coil assembly 380 receives the carrier signal, and the second controller 310 in the secondary signal transmission loop 300 demodulates the carrier signal through the corresponding modulation and demodulation filter module to obtain the corresponding digital signal.

Taking the normal operation of the first primary coil 181 and the failure of the second primary coil 182 in the primary coil assembly 180 as an example, the second signal transmission working mode is: the first controller 110 in the primary signal transmission circuit 100 will need a corresponding digital signal It is transmitted to the first modulation and demodulation filtering module 121 to obtain a carrier signal of the seventh frequency F7, and is transmitted to the first primary coil 181 through the first resonance compensation module 141. Both the first secondary coil 381 and the second secondary coil 382 in the secondary coil assembly 380 can induce the carrier signal of the seventh frequency F7.

The third modem filter module 321 connected to the first secondary coil 381 can demodulate the received carrier signal to obtain a corresponding digital signal. At the same time, the fourth modem filter module 322 connected to the second secondary coil 382 can also demodulate the received carrier signal to obtain a corresponding digital signal.

In actual use, due to some other reasons, at different times, the stability and anti-interference of the loop signal where the first secondary coil 381 and the second secondary coil 382 are located may be inconsistent. Therefore, the loops where the first secondary coil 381 and the second secondary coil 382 are located have different signal quality at different times. The digital signal demodulated by the third modem filter module 321 at different times can be compared with the first The digital signals demodulated by the four-modulation and demodulation filtering module 322 are compared and mutually supplemented, and data with high demodulation quality is preferentially selected as the final received data, thereby improving the accuracy of the entire received data.

It should be noted that in the case of a carrier signal of the seventh frequency F7 that cannot be demodulated by the third modem filter module 321 or the fourth modem filter module 322, the third modem filter module 321 or the third modem filter module 321 can be adjusted in advance. The relevant parameters of the fourth modulation and demodulation filtering module 322 are used to realize a carrier signal of the seventh frequency F7 that can be demodulated.

Taking the normal operation of the first primary coil 181, the failure of the second primary coil 182, the normal operation of the first secondary coil 381, and the failure of the second secondary coil 382 as examples, the above-mentioned fourth signal transmission operating mode is described:

It can be determined first whether the first modem filter module 121 corresponds to the third modem filter module 321, that is to say, whether the third modem filter module 321 can demodulate, the first modem filter module 121 modulates Carrier signal. In the case where the above two do not correspond, the carrier frequency in the modulation by the third modem filter module 321 or the first modem filter module 121 can be adjusted first to make the two correspond. In the case of whether the first modulation and demodulation filtering module 121 corresponds to the third modulation and demodulation filtering module 321, signal transmission can be performed according to the signal transmission manner in the prior art. Through this scheme, the reliability of signal transmission can be further improved.

In some embodiments of the present application, when the primary signal transmission circuit 100 and the secondary signal transmission circuit 200 are both normal, the signal transmission working mode thereof may be the third signal transmission working mode. Specifically, the third signal transmission working mode is:

The first controller 110 in the primary signal transmission circuit 100 divides the corresponding digital signals to obtain the third digital sub-signal and the fourth digital sub-signal;

The third digital sub-signal is modulated into a carrier sub-signal of the third frequency F3 through the first modulation and demodulation filtering module 121, and is transmitted to the first primary coil 181 through the first resonance compensation module 141; and through the second modulation and demodulation The filter module 122 modulates the fourth digital sub-signal into a carrier sub-signal of the fourth frequency F4, and transmits it to the second primary coil 182 through the second resonance compensation module 142; wherein the frequencies of the third frequency F3 and the fourth frequency F4 are Different values;

Through electromagnetic induction, both the first secondary coil 381 and the second secondary coil 382 can receive the carrier sub-signal of the third frequency F3 and the carrier sub-signal of the fourth frequency F4;

Through the third modulation and demodulation filtering module 321 connected to the first secondary coil 381, demodulate the carrier sub-signal of the third frequency F3 to obtain the corresponding third digital sub-signal; and through the second secondary coil 382 The connected fourth modulation and demodulation filtering module 322 demodulates the carrier sub-signal of the fourth frequency F4 to obtain the corresponding fourth digital sub-signal;

The second controller 310 in the secondary signal transmission loop 300 generates corresponding digital signals according to the third digital sub-signal and the fourth digital sub-signal, thereby completing signal transmission.

It should be noted that F3 and F1 may be the same or different; F4 and F2 may be the same or different, and are not limited in the embodiments of the present application.

Through the above solution, the first controller 110 divides the required corresponding digital signals and modulates them with different carrier frequencies to obtain carrier sub-signals of different carrier frequencies. The carrier sub-signals are transmitted to different

primary coils

181 and 182. Due to electromagnetic induction, the

secondary coils

381 and 382 in the secondary coil assembly 380 all induce the carrier sub-signals. The signal is filtered and demodulated by the third modem filter module 321 and the fourth modem filter module 322 in the secondary signal transmission loop 300 to obtain the corresponding digital signal. Compared with the signal transmission method in the prior art, on the basis of improving the reliability of the signal transmission system, the signal transmission speed is also greatly improved.

In the case where both the primary signal transmission circuit 100 and the secondary signal transmission circuit 200 are normal, the signal transmission working mode thereof may be the fifth signal transmission working mode. Specifically, the fifth signal transmission working mode is:

The first controller 110 in the primary signal transmission circuit 100 divides the corresponding digital signals to obtain the seventh digital sub-signal and the eighth digital sub-signal;

The seventh digital sub-signal is modulated into a carrier sub-signal of the eighth frequency F8 through the first modulation and demodulation filtering module 121, and is transmitted to the first primary coil 181 through the first resonance compensation module 141; and through the second modulation and demodulation The filtering module 122 modulates the fourth digital sub-signal into a carrier sub-signal of the ninth frequency F9, and transmits it to the second primary coil 182 through the second resonance compensation module 142; among them, the frequencies of the eighth frequency F8 and the ninth frequency F9 Different values;

In the same way, F8 and F1 can be the same or different; F9 and F2 can be the same or different.

Through electromagnetic induction, both the first secondary coil 381 and the second secondary coil 382 can receive the carrier sub-signal of the eighth frequency F8 and the carrier sub-signal of the ninth frequency F9;

Both the third modem filter module 321 and the fourth modem filter module 322 are set to dual-channel communication, so that the third modem filter module 321 can perform the detection of the carrier sub-signal of the eighth frequency F8 and the ninth frequency. The carrier sub-signal of F9 is demodulated to obtain the corresponding seventh digital sub-signal and eighth digital sub-signal; the fourth modulation and demodulation filtering module 322 can also perform the demodulation of the carrier sub-signal of the eighth frequency F8 and the carrier of the ninth frequency F9. The sub-signals are demodulated to obtain corresponding seventh digital sub-signals and eighth digital sub-signals;

Comparing the seventh digital sub-signal obtained by the third demodulation and filtering module 321 with the seventh digital sub-signal obtained by the fourth modulation and demodulation filtering module 322 at different times; and

Compare the eighth digital sub-signal obtained by the third demodulation filtering module 321 with the eighth digital sub-signal obtained by the fourth modulation and demodulation filtering module 322;

The seventh digital sub-signal and the eighth digital sub-signal with high demodulation quality at different moments are selected as the signals received by the secondary coil assembly.

Through the fifth signal transmission working mode, the transmission efficiency of the signal can be improved, and the correctness of the signal transmission can also be ensured.

It should be noted that in the above-mentioned embodiments of the present application, the primary signal transmission circuit 100 is used as the signal sender, and the secondary signal transmission circuit 300 is used as the signal receiver. Through the above-mentioned embodiments, those skilled in the art can know that the secondary signal transmission circuit can also be used as the signal sender, and the signal transmission working mode is the same as or similar to the working mode in the above-mentioned embodiment of this application. Go into details.

The signal transmission method of the rotary steering drilling tool provided by the embodiment of the present application effectively improves the reliability of the signal transmission of the rotary steering drilling tool by setting the primary coil assembly 180, reduces maintenance costs, and increases the service life. In addition, the signal transmission working mode can be determined according to the working state of the primary coil assembly 180 to provide different working modes. While ensuring the normal operation of the signal transmission, the signal transmission rate is increased as much as possible and energy consumption is saved.

The various embodiments in this application are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, as for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for related parts, please refer to the part of the description of the method embodiment.

The system and method provided in the embodiments of this application correspond one-to-one. Therefore, the system also has beneficial technical effects similar to the corresponding method. Since the beneficial technical effects of the method have been described in detail above, it will not be repeated here. The beneficial technical effects of the system.

Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

The present invention is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are used to generate It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

In a typical configuration, the computing device includes one or more processors (CPU), input/output interfaces, network interfaces, and memory.

The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and/or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM). Memory is an example of computer readable media.

Computer-readable media include permanent and non-permanent, removable and non-removable media, and information storage can be realized by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical storage, Magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media can be used to store information that can be accessed by computing devices. According to the definition in this article, computer-readable media does not include transitory media, such as modulated data signals and carrier waves.

It should also be noted that the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or equipment including a series of elements includes not only those elements, but also Other elements that are not explicitly listed, or include elements inherent to such processes, methods, commodities, or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, commodity or equipment that includes the element.

The above descriptions are only examples of this application, and are not intended to limit this application. For those skilled in the art, this application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the scope of the claims of this application.

Claims

A signal transmission method for a rotary steering drilling tool, the rotary steering drilling tool including a rotating mandrel, characterized in that the method includes:

Acquiring a primary signal of a primary signal transmission circuit collected by the first collector, the primary signal transmission circuit including a primary coil assembly disposed on the rotating mandrel, the primary coil assembly including a first primary coil and a second primary coil;

According to the primary signal, determine whether the primary signal transmission loop is abnormal;

In the case that the primary signal transmission circuit is abnormal, a corresponding activation signal is sent to the first failure determination module provided in the primary signal transmission circuit to enable the first failure determination module to activate and determine the primary coil The working status of the component;

According to the working state of the primary coil assembly, the working mode of signal transmission is determined.
The method according to claim 1, wherein the rotary steering drilling tool further comprises a non-rotating sleeve, wherein the method further comprises:

Acquire the secondary signal of the secondary signal transmission circuit collected by the second collector, the secondary signal transmission circuit includes a secondary coil assembly disposed on the non-rotating sleeve, and the secondary coil assembly includes a first secondary Coil and second secondary coil;

According to the secondary signal, determine whether the secondary signal transmission loop is abnormal;

In the case that the secondary signal transmission circuit is abnormal, a corresponding activation signal is sent to the second failure determination module provided in the secondary signal transmission circuit, so that the second failure determination module activates and determines the The working status of the secondary coil assembly.
The method according to claim 2, wherein the working state includes: a normal state and an abnormal state;

The normal state of the primary coil assembly is that both the first primary coil and the second primary coil work normally;

The abnormal state of the primary coil assembly is that the first primary coil is working normally, the second primary coil is malfunctioning, or the first primary coil is malfunctioning and the second primary coil is malfunctioning;

The normal state of the secondary coil assembly is that both the first secondary coil and the second secondary coil are working normally;

The abnormal state of the secondary coil assembly is the normal operation of the first secondary coil and the failure of the second secondary coil, or the failure of the first secondary coil and the normal operation of the second secondary coil.
The method according to claim 3, wherein the determining the working mode of the signal transmission according to the working state of the primary coil assembly specifically comprises:

When the primary coil assembly is in a normal state and the secondary coil assembly is in an abnormal state, the signal transmission working mode is the first signal transmission mode.
The method according to claim 4, wherein the first signal working transmission mode is:

The first controller in the primary signal transmission loop divides the corresponding digital signals to obtain the first digital sub-signal and the second digital sub-signal;

The first digital sub-signal is modulated into a carrier sub-signal of the first frequency through the first modem filter module, and is transmitted to the first primary coil connected to the first modem filter module; and through the second The modem filter module modulates the second digital sub-signal into a carrier sub-signal of the second frequency, and transmits it to a second primary coil connected to the second modem filter module; wherein, the first frequency Different from the frequency value of the second frequency;

The normally working secondary coil in the secondary coil assembly receives the carrier sub-signal of the first frequency and the carrier sub-signal of the second frequency;

Demodulate to obtain the corresponding first digital sub-signal and second digital sub-signal through the modulation and demodulation filtering module connected to the secondary coil in the normal state in the secondary coil assembly;

The second controller in the secondary signal transmission loop obtains a corresponding digital signal according to the first digital sub-signal and the second digital sub-signal.
The method according to claim 4, wherein the determining the signal transmission working mode according to the working state of the primary coil component and the working state of the secondary coil component specifically further comprises:

When the primary coil assembly is in an abnormal state and the secondary coil assembly is in a normal state, the signal transmission mode is the second signal transmission working mode.
The method according to claim 6, wherein the second signal transmission working mode is:

The first controller in the primary signal transmission loop modulates the corresponding digital signal through a modulation and demodulation filter module connected to a normal working primary coil to obtain a carrier signal of a corresponding frequency;

The secondary coil in the secondary coil assembly receives the carrier signal, and the second controller in the secondary signal transmission loop demodulates the carrier signal through the corresponding modulation and demodulation filter module to obtain The corresponding digital signal.
The method according to claim 2, wherein the method further comprises:

In the case that both the primary signal transmission circuit and the secondary signal transmission circuit are normal, determining that the signal transmission working mode is the third signal transmission working mode;

Wherein, the third signal transmission working mode is:

The first controller in the primary signal transmission loop divides the corresponding digital signals to obtain the third digital sub-signal and the fourth digital sub-signal;

The third digital sub-signal is modulated into a carrier sub-signal of a third frequency through the first modem filter module, and is transmitted to the first primary coil connected to the first modem filter module; and The second modulation and demodulation filtering module modulates the fourth digital sub-signal into a carrier sub-signal of the fourth frequency and transmits it to the second primary coil connected to the second modulation and demodulation filtering module; wherein, the first The frequency value of the third frequency is different from that of the fourth frequency;

Both the first secondary coil and the second secondary coil can sense the carrier sub-signal of the third frequency and the carrier sub-signal of the fourth frequency;

Through the third modulation and demodulation filter module connected to the first secondary coil, demodulate the carrier sub-signal of the third frequency to obtain the corresponding third digital sub-signal; The fourth modulation and demodulation filtering module connected to the first-stage coil demodulates the carrier sub-signal of the fourth frequency to obtain the corresponding fourth digital sub-signal;

The second controller in the secondary signal transmission loop generates a corresponding digital signal according to the third digital sub-signal and the fourth digital sub-signal.
The method according to claim 1, wherein the first fault determining module determines the working status of the primary coil assembly, which specifically includes:

The first fault determination module sends corresponding excitation signals to the input terminal of the first primary coil and the input terminal of the second primary coil respectively;

After sending the corresponding excitation signal, the first fault determination module collects the signals of the output terminal of the first primary coil and the output terminal of the second primary coil respectively, and obtains the determination data according to the collected signals;

According to the determination data, the working state of the primary coil assembly is determined.
A signal transmission system for a rotary steering drilling tool, the rotary steering drilling tool including a rotating mandrel, characterized in that the system includes:

The first collector is used to collect the primary signal of the primary signal transmission circuit, the primary signal transmission circuit includes a primary coil assembly arranged on the rotating mandrel, the primary coil assembly includes a first primary coil and a second primary coil ；

The first processor is electrically connected to the first collector, and is used to obtain the primary signal and determine whether the primary signal transmission circuit is abnormal according to the primary signal; and when the primary signal transmission circuit is abnormal In this case, send a corresponding start signal to the first fault determination module;

The first fault determination module is arranged in the primary signal transmission circuit, and is used for starting according to the starting signal and determining the working state of the primary coil assembly.